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Clades (2 of 2) Nested clades

Image caption:Clades are nested within one another  they form a nested hierarchy. A clade may include many thousands of species or just a few. Some examples of clades at different levels are marked on these phylogenies. Notice how clades are nested within larger clades.

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Clades (1 of 2) DefinitionA clade is a grouping that includes a common ancestor and all the descendants (living and extinct) of that ancestor. Using a phylogeny, it is easy to tell if a group of lineages forms a clade. Imagine clipping a single branch off the phylogeny  all of the organisms on that pruned branch make up a clade.